Stop for bag closing machines



June 19, 1934. c, F, ALUSON 1,963,730

STOP FOR BAG CLOSING MACHINES Filed Dec. 2s. 1931 2 sheets-sheet 1 1-7&2 rg@ H5- June 19, 1934. c. F. ALLlsoN STOP FOR BAG CLOSING MACHINES Filed D60. 26, 1931 2 SheebS-Sheei'l 2 Patented June 19, 1934 UNITEDd STATES PATENT :OFFICE Gump Co., Chicago, Ill., a corporation of Illi'- Y nois i Application December 26, 1931, Serial No. 583,274

3 Claims.

This invention relates to a bag folding and sealing machine and concerns itself with a structure in which the feed belt deposits the bag in position for tucking in the ends of the empty neck of the bag and collapsing the sides of the empty neck of the bag slightly in advance of the propellers on the endless conveyer chain that propels the bag and in which a yielding stop member has been placed for arresting the bag w and retaining the same in its proper position below the end tucking members and the collapsing members. The machine is so timed that the propeller as its advances will not engage the bag until the tucking and collapsing operations have l5 been completed, the yielding stop member being so constructed that it will yield and allow the bag to pass as soon as it is engaged by a bag propeller.

The invention comprises the novel structure and combination of parts hereinafter described 20 and more particularly pointed out and defined in the appended claims.

In the accompanying drawings which illustrate a preferred form of this invention and in which similar reference numerals refer to similar features in the different views:

Figure 1 is a fragmentary side elevational view of a bag closing and sealing machine involving this invention.

Figure 2 is a fragmentary plan View of the ma- 30 chine with parts omitted.

Figure 3 is an enlarged sectional view taken upon the line III--III of Figure 2 looking in the direction of the arrows.

In the drawings there has been illustrated a 35 feed belt 1 which is mounted upon suitable pulleys 2 which are suitably journalled in the framework 3 which is attached to the machine. Above the feed belt 1 are guide members 4 and 5 which are adapted for guiding the upstanding bag conveyed by the belt 1. The belt 1 is designed to deposit the bag upon a stationary bag platform or runway 6 at the inner end of said belt. When the bags are deposited upon the runway 6 by the feed belt 1 they engage a yielding stop member 7 which will now be set forth.

The stop member 7 has an arm 8 which is pivoted upon the rod 9 having a collar 10 adjustably secured at its upper end by means of a set screw 11. A coil spring 12 surrounds the rod 9 and has one end anchored in the collar and the other end anchored in the arm 8. This coil spring yieldingly tends to maintain the stop member in a transverse position with respect to the runway 6 as shown in Figure 2. The spring 12, however, 55 is suiciently flexible to allow the stop member to be swung to one side when the bag is engaged by one of the propellers 13 mounted upon the conveyer chain 14. The rod or stud 9 is supported by means of a block 15 having side flanges 16 provided with slot 17 for receiving screws 18 that attach the stop member to the guide 4. It will be evident that the slot and screw connection allows the stop member to be adjusted as desired for different sizes of bags and for properly positioning the bags below the tucking and collapsing mechanisms.

Above the conveyer chain 14, there is a table or bench 19 which supports a standard 20 having a collar 2l thereon in which a pair of shafts 22 and 23 are journalled. The rear ends of these shafts 22 and 23 are geared together as shown in my copending application, Serial No. 548,912, led July 6, 1931. Each shaft carries an end tucking member 24 and these members are simultaneously actuated for tucking in the ends of the neck of the bag. The shaft 22 has an arm 25 which is connected by a link 26 to a lever 27 which is pivoted a short distance above its lower end to the framework of the machine as indicated at 28. The tail 29 of the lever 27 extends Sm, into the path of a pair of rollers 30 which are carried by the conveyer chain. Obviously as these rollers advance toward the left and engage the tail 29, they will actuate the end tucking members 24. Upon one side of the feed belt 1 35"; and bag runway 6, there is mounted a rod 31 upon which a collapsing member 32 is mounted. ThisV rod 31 has a crank arm 33 at one end which is connected by a link 34 to an arm 35 extending from a sleeve 36 rotatably mounted upon a shaft 37 extending from a collar 38 mounted upon the upper end of the standard 31. This mechanism just described is duplicated upon the other side of the runway as shown in my copending application above referred to. The 9 sleeve 36 is provided with another arm 39 which is connected by a link 40 to one end of a triangular cam member 41 which is pivoted at its other end to the framework of the machine as indicated at 42. This cam member normally 109 extends into the path of the rollers 30. A coil spring 43 yieldingly anchors the arm 39 to the standard and is effective for normally maintaining the cam member 41 in the path of the rollers. It might be mentioned that when the rollers 30 105 encounter the cam member 41 it will elevate the link 40 and actuate the sleeve 36 and the links 34 for pressing the collapsing plates 32 against the neck of the bag as more fully explained in my copending application. The lever 27 is likeno 44 to the standard for normally maintaining the tail 29 of said lever in the path of said rollers.

A latch member 45 firmly engages the cam 41 maintaining the same in position against tension of the spring 43. It might be mentioned that this latch member is connected by a rod 46 shown in dotted lines to a cam member 4'7 which is actuated by the rollers to release said latch which is normally held in its position by a spring 48.

At a convenient point along the feed belt 1, there is a bag timing or regulating device which is generally denoted by the reference numeral 49 whereby bags are fed one at'a time in proper sequence. This bag regulator has not been fully illustrated. It however may be actuated by the continuously operating conveyer chain in the manner set forth in the copending application of Allison and Naeher Serial No. 491,923, filed October 30, 1930.'

It will be appreciated that according to this invention, the bag is momentarily arrested in its properk position'below the end tucking members and the collapsing members to allow the Vsaine to properly function before the bag is advanced by the conveyer chain.

I am aware that many changes may be made and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I thereby do not purpose limiting the patent granted hereonA otherwise than necessitated by the prior art.

I claim as my invention:

1. In a bag closing machine, a bag runway, a conveyor for propelling the bag along said runway, a resilient stop adjacent the front end of said runway, a feeding belt for advancing the bag to said runway and against said stop, mechanism for acting on the neck of the bag while the same is positioned against said stop, said conveyor having propellers `for engaging said bag after the same is acted upon by said mechanism for propelling the same past said stop.

2. In a bag closing machine, a bag runway, a conveyor having propellers for engaging said bag and moving the same along said runway, a resilient stop upon the front end of said runway, a feeding belt for advancing the bag to said runway against said stop, mechanism for tucking in the neck of the bag while the same is positioned against said runway, said conveyer being so timed that said propellers will engage said bag after the tucking operation and move the same past said resilientl stop.

3. In abag closing machine, a platform, a resilient stop adjacent .the front end of said platform, traveling means for conveying a bag upon 100 said platform and against said stop, means for acting upon the neck of said bag while the same is positioned against said stop, and a conveyor having flights for engaging said bag and moving it past said stop.

ics CHARLES F. ALLIsoN.

lr- Y- :wiso 

